Richard raby



Patented Dec. l3, I898.

R. BABY. LIFTING JACK.

Application filed Sept. 27, 1898.;

(No Model.)

Wilmea aea flaw-M 81 WASNINCTION, a L:v

UNITED STATES PATENT 61 nch.

RICHARD RABY, OF HARRISBURG, PENNSYLVANIA, ASSIGNOR TO JAMES CAMPBELLAND WILLIAM H. I-IECKENDORN, OF SAME PLACE.

LlFTING-JACK.

SPECIFICATION forming part of Letters Patent No. 615,745, dated December13, 1898.

Application filed September 27,1898. Serial No. 692,026. (No model.)

To all whom it may concern:

Be it known that I, RICHARD RABY, a citizen of the United States,residing at Harrisburg, in the county of Dauphin and State ofPennsylvania, have invented certain new and useful Improvements inLifting-Jacks, of which the following is a specification.

My invention relates to improvements in lifting-jacks of the kindwherein a liftingbar is used in conjunction with a cam-lever; and theobject of my improvements is to simplify and strengthen the constructionof such jacks and to render them more compact for the purpose of storageor shipment.

In the accompanying drawings,which illustrate my invention, Figure 1 isa longitudinal sectional view of my improved jack, taken on the line 1 1of Fig. 2. Fig. 2 is a top plan view of the jack, and Fig. 3 is aperspective view of the upper ends of the standards and the yoke-piecejoining the same.

Referring to the drawings, 1 indicates the base or support for the jack,and 2 and 3 indicate a pair of wooden standards similar in constructionand secured on either side of the base by bolts 4;, passing through thestandards and the base. The lower parts 5 of the standard are, as shown,wider than the upper parts, these widenedportions extending rearwardlyfrom the vertical line of' the standard proper. The lifting-lever 6 isfulcrumed between the standards upon a bolt 7,

passing through the rearward extensions 5. The short arm of the leverconsists of a cam S, projecting toward thefront of the jack, the surfaceof said cam being so formed that when the long arm of the lever 6 israised to its fullest extent, as shown in Fig. 1, the lifting-bar 9 willrest upon the upper part 10 of the cam and thereby hold the lever in itsupright position, while when the long arm of the lever is moved downwardto its fullest extent the lifting-bar will rest upon the part 11 of thecam. A suitable strap 12 may be placed upon the camsurfac'e to preventwear by the lifting-bar.

The standards 2 and 3 are united at their upper ends by a metallic yoke13, consisting of two flat side pieces 14, joined at the rear by across-piece 15. The standards fit against the outer faces of the sidepieces 14, and the latter are provided with flanges 16, which projectoutwardly and embrace the edges of the standards. standards and theyoke, holds the several parts securely together. The upper surfaces ofthe side pieces 14, as shown in Fig. 3, have the same general outline asthe upper ends of the standards and lie flush therewith. A pair offlanges 18 project inwardly from the opposing faces of the side pieces14, said flanges extending from the cross-piece 15 to about the centralline of the side pieces and forming guides for the bar 9.

The lifting-bar 9 is formed With a yoke 19 at the bottom, and a roller20, adapted to roll upon the strap 12, is journaled in the arms of theyoke. This yoke is nearly equal in width to the distance between thestandards and forms a guiding meansfor holding the lower end of the barcentrally between the standards. Longitudinal guide-slots 21 and 22 areformed in the bar, through which extend the bolts 17 and 23,respectively. As shown, a rib'24: extends around the top and edges ofthe bar, being cut away at 25, so that the flanged arms 26 of anadjustable step 27 may be passed downward over the rib upon the frontedge of the bar. The step 27 is provided with a dog 28, which engages atoothed rack 29, formed upon the front edge of the bar. The flanged arms26 surround the rib loosely, so that the dog may be readily disengagedfrom the rack when desired. The bar 9 is about equal in width to thestandards which inclose it, and the flanged arms project into the spacebetween the standards. The step may be moved freely up and down throughthe yoke 13, as the guides 18 do not project forward far enough tointerfere.

In operation the bar is raised or lowered by means of the lever in theusual manner. By reason of the location of the pivotal point of thelever at one side of the lifting-bar the A bolt 17, passing through thelong arm of the lever in its raised position 5 fore occupy little spacewhen not in use or when packed for storage or shipment. For

moved.

The yoke 13 and bolt 17 hold the standards rigidly in position, saidbolt also serving as a guide-pin in the slot 21 to prevent forward orbackward movement of the bar, while the guides 18 upon the yoke preventlateral motion of the bar.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1S--- 1. In a lifting-jack, the combination with a pairof standards and a lifting-bar movable vertically between said standardsand having a longitudinal slot, of a yoke arranged between the upperends of said standards and having guides for said bar, and a boltextending through said standards and yoke and RICHARD BABY.

lVitnesses:

WM. 0. ARMOR, MARY E. I-IAUER.

